Force

Force plays a big part in physics. Many of the scientists mentioned that forces are found everywhere in the universe. The force could be a big one, such as the gravity of a planet that could pull many space objects like asteroids or space rocks. The force could also be a very small one, such as the pull of a nucleus on an electron. Forces are acting everywhere on earth and also in the universe at all times.

Many of force examples on earth that we often see in our daily life, we use force to lift the objects, to walk on the road, to throw a ball, to squeeze the clothes so it would be removed from the water, or to move a given body by some particular speed or direction. As you know water would always find for the lowest part of the place, it happens because of the force affecting it. We are very familiar with the various effects of force. We can exert pull and push. We must apply a push through something rigid, while pull can act through a non-rigid connector such as a rope or a string or a wire.

There are often many forces at work. We might not learn or recognize all of them yet, but even if we’re standing on the floor, we would have a bunch of forces acting on us. Those forces would include the gravitational force. The gravitational force is a force that attracts any object with mass. Every object, including people like us, is pulling on every other object in the entire universe, it is also called Newton’s Universal Law of Gravitation.

The force of air particles hitting our body from all directions, and the force being exerted by the ground it’s also called the normal force. For example, what are the forces acting on a ball before we kicked it? As the ball sat there, the force of gravity was keeping it on the ground, while the ground pushed upward, supporting the ball. On a molecular level, the surface of the ball was holding itself together as the gas inside of the ball tried to escape. There may have also been small forces trying to push it as the wind blew. Those forces were too small to get it rolling, but they were there.

If there is more than one force acting on the object, the forces can be added up if they act in the same direction, so the force acts on the object is equal to the sums of the forces that act on the object. It can be subtracted if they act in opposite directions. Many Scientists measure forces in units called Newton (N). It’s a derived unit based from mass (kg) times acceleration or meter divided by time (s) power of two. So we could also use Kg.m.s-2 for force’s unit. Forces can be measured using a tool called the force meter. Force meters contain a spring connected to a metal hook. The spring stretches each time when a force is applied to the hook. The bigger the force applied, the longer the spring stretches and the bigger the reading would be.

#Physics